Fig. 4 Gravity map over the southwestern part of the Chicxulub crater (15). The star represents the centre of the crater. The number lines (1-6) are gravity peaks that show the multi-ringed structure of the crater. The dots represent cenotes. These are particularly evident between 4 and 5, where they are thought to result from slumping at the crater rim. Note the linear features in some of the outer rings to the southwest.